package com.zjut.an.util.tools;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.imageio.ImageIO;
import javax.imageio.stream.ImageOutputStream;

import org.apache.commons.io.IOUtils;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import com.zjut.an.util.tools.FileNameUtils;
import com.zjut.an.util.system.UploadUtils;
import com.opensymphony.xwork2.ActionContext;

public class CodeImageAction {
	
	public static String crawlImg(String imgUrl,String contextPath,String uploadPath) {
		HttpClient client = new DefaultHttpClient();
		String outFileName="";
		try{
			HttpGet httpget = new HttpGet(new URI(imgUrl));
			HttpResponse response = client.execute(httpget);
			InputStream is = null;
			OutputStream os = null;
			HttpEntity entity = null;
			entity = response.getEntity();
			is = entity.getContent();
			outFileName=UploadUtils.generateFilename(uploadPath, FileNameUtils.getFileSufix(imgUrl));
			File outFile=new File(outFileName);
			UploadUtils.checkDirAndCreate(outFile.getParentFile());
			os = new FileOutputStream(outFile);
			IOUtils.copy(is, os);
		}catch (Exception e) {
			e.printStackTrace();
		}
		return contextPath+outFileName;
	}
	
	public static  List<String> getImageSrc(String htmlCode) {  
        List<String> imageSrcList = new ArrayList<String>();  
        String regular="<img(.*?)src=\"(.*?)\"";  
        String img_pre="(?i)<img(.*?)src=\"";
        String img_sub="\"";
        Pattern p=Pattern.compile(regular,Pattern.CASE_INSENSITIVE);
        Matcher m = p.matcher(htmlCode);  
        String src = null;  
        while (m.find()) {  
        	src=m.group();
        	src=src.replaceAll(img_pre, "").replaceAll(img_sub, "").trim();
            imageSrcList.add(src);  
        }  
        return imageSrcList;  
    }

	
	private ByteArrayInputStream inputStream;

	public ByteArrayInputStream getInputStream() {
		return inputStream;
	}

	public void setInputStream(ByteArrayInputStream inputStream) {
		this.inputStream = inputStream;
	}

	public String add() {
		return "success";
	}

	/**
	 * 生成随机颜色
	 * 
	 * @param fc 前景色
	 * @param bc 背景色
	 * @return Color对象，此Color对象是RGB形式的。
	 */
	private Color getRandColor(int fc, int bc) {
		Random random = new Random();
		if (fc > 255)
			fc = 255;
		if (bc > 255)
			bc = 255;
		int r = fc + random.nextInt(bc - fc);
		int g = fc + random.nextInt(bc - fc);
		int b = fc + random.nextInt(bc - fc);
		return new Color(r, g, b);
	}

	public String createImage() {
		System.out.println("%%%% creat Image %%%");
		// 在内存中创建图象
		int width = 60, height = 20;
		BufferedImage image = new BufferedImage(width, height,
				BufferedImage.TYPE_INT_RGB);
		// 获取图形上下文
		Graphics g = image.getGraphics();
		// 生成随机类
		Random random = new Random();
		// 设定背景色
		g.setColor(getRandColor(200, 250));
		g.fillRect(0, 0, width, height);
		// 设定字体
		g.setFont(new Font("Times New Roman", Font.PLAIN, 18));
		// 随机产生155条干扰线，使图象中的认证码不易被其它程序探测到
		g.setColor(getRandColor(160, 200));
		for (int i = 0; i < 155; i++) {
			int x = random.nextInt(width);
			int y = random.nextInt(height);
			int xl = random.nextInt(12);
			int yl = random.nextInt(12);
			g.drawLine(x, y, x + xl, y + yl);
		}
		// 取随机产生的认证码(6位数字)
		String sRand = "";
		for (int i = 0; i < 4; i++) {
			String rand = String.valueOf(random.nextInt(10));
			sRand += rand;
			// 将认证码显示到图象中
			g.setColor(new Color(20 + random.nextInt(110), 20 + random
					.nextInt(110), 20 + random.nextInt(110)));
			// 调用函数出来的颜色相同，可能是因为种子太接近，所以只能直接生成
			g.drawString(rand, 13 * i + 6, 16);
		}
		// 将认证码存入SESSION
		ActionContext.getContext().getSession().put("rand", sRand);
		// 图象生效
		g.dispose();
		ByteArrayOutputStream output = new ByteArrayOutputStream();
		ImageOutputStream imageOut = null;
		try {
			imageOut = ImageIO.createImageOutputStream(output);
			ImageIO.write(image, "JPEG", imageOut);
			imageOut.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		ByteArrayInputStream input = new ByteArrayInputStream(output.toByteArray());
		this.setInputStream(input);

		return "success";
	}

	public String validate() {

		String strv = (String) ActionContext.getContext().getSession().get(
				"rand");// 获取图片的验证码
		System.out.println("strv = " + strv);// 在这里可以验证手动输入的验证与图片的验证是否相同
		return "success";
	}
}
